STEVAN'S THE MAN: Steven Jovetic fires past Petr Cech to put City one up [GETTY]

The Chelsea boss saw his side make an unusually feeble exit from the competition as City deservedly triumphed through goals from Stevan Jovetic and substitute Samir Nasri.

For City, whose quadruple hopes are still very much alive, it was revenge for their defeat here against a totally different Chelsea 12 days earlier.

And the result gave City boss Manuel Pellegrini only his second win against Mourinho in ten meetings. Both managers went for strong line-ups, despite their other commitments.

And Chelsea’s team was especially powerful, with only injured skipper John Terry missing, while Oscar started on the bench.

But it was City who surged into the lead as Jovetic hit the woodwork twice in the 16th minute – the second time bringing that early goal.

On the first occasion, the attacking midfielder’s effort hit the top of the bar and flew behind after Chelsea keeper Petr Cech had failed to hold Yaya Toure’s drive.

PERFECT COMEBACK: Samir Nasri netted City's second on his return from injury [GETTY]

“Chelsea’s slow start made it a comfortable opening to the tie for City”

But City were straight back at the visitors, with a sweeping move involving Gael Clichy, David Silva and Edin Dzeko.

The attack ended with Jovetic striking a right-foot shot across Cech and in off the far post.

It was previously free-scoring City’s first goal in three matches.

Cech then had to beat away a curling effort by Dzeko after the busy Jovetic had supplied the cross.

Chelsea’s slow start made it a comfortable opening to the tie for City.

But there was a moment of alarm when keeper Costel Pantilimon, deputising as usual in the cup for Joe Hart, only gathered Branislav Ivanovic’s cross at the second attempt.

Ivanovic, the match winner at the Etihad 12 days earlier, had driven the ball in hard and low from the right and Pantilimon initially fumbled, before claiming the ball with Samuel Eto’o waiting to pounce.

Mourinho responded to a surprisingly-subdued performance from his side by withdrawing Eto’o at half time and replacing him with Mohamed Salah.

Eden Hazard was also pushed further forward as the Chelsea boss sought a greater threat from his side.

Eto’o had been starved of service and almost a spectator as Toure, Silva and Jovetic – later booked for a blatant dive – controlled the match.

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And City could have made it 2-0 when a James Milner cross flew across the face of the goal with Dzeko unable to get a touch.

But they did finally grab a vital second goal in the 67th minute through Nasri, who had come on for Jovetic just six minutes earlier.

The Frenchman worked a delightful one-two with Silva before side-footing into an empty net.

Joleon Lescott also forced the ball into the Chelsea net 14 minutes from time but that was ruled offside.